[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2027) ComponentType.replace reverts interceptor's changes to null component

ComponentType.replace reverts interceptor's changes to null component --------------------------------------------------------------------- Key: HHH-2027 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2027 Project: Hibernate3 Type: Bug

Components: core Versions: 3.2.0.cr2 Environment: Hibernate r10347 java version "1.5.0_07" Reporter: Josh Moore Attachments: nullcomponentinterceptor.zip When an interceptor sets a previously null component-typed property of an entity to a non-null value, ComponentType.replace reverts the value to null due to the lines 422-425: if ( original == null ) { return null; } This means it is not possible on Interceptor.onSave() to "fix" a null component even if true is returned. Excerpts from the attached zip file follow: [MAPPING] <class name="Image" table="image" abstract="false" select-before-update="true"> <id name="id" type="java.lang.Long" column="id"><generator class="native"/></id> <component name="details" class="Details"> <property name="perm1" not-null="true" type="long" column="permissions"/> </component> <property name="name" type="java.lang.String" column="name" not-null="true" length="256"/> </class> [INTERCEPTOR] public class DetailsInterceptor extends EmptyInterceptor { boolean onSaveCalled = false; @Override public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) { state[0] = new Details(); onSaveCalled = true; return true; } } [TEST] DetailsInterceptor pi = new DetailsInterceptor(); Session s = openSession( pi ); Transaction t = s.beginTransaction(); Image i = new Image(); i.setName("compincomp"); // the interceptor does the equivalent of: // // i.setDetails( new Details() ); // // which when uncommented makes this test pass. // // without that line, the null details gets copied back to the result // on merge causing the following on commit: /* org.hibernate.PropertyValueException: not-null property references a null or transient value: org.hibernate.test.compincomp.Image.details at org.hibernate.engine.Nullability.checkNullability(Nullability.java:72) at org.hibernate.event.def.DefaultFlushEntityEventListener.scheduleUpdate(DefaultFlushEntityEventListener.java:263) at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:121) at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:195) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) */ s.merge(i); assertTrue( pi.onSaveCalled ); t.commit(); s.close();